Electrical attachment-plug.



UNTTED sTATEs PATENT oEEIcE.

JOHANN G. PETERSON, 0F J ERSEY CITY, NEW J EBSEY.

ELECTRICAL ATTACHM ENT-PLUG.

Specication of Letters Patent.

Patented Sept. 17, 1918.`

Application led November 23, 1917. Serial No. 203,617.

-simple in construction,` quite compact and susceptible of inexpensivemanufacture.

In the drawings accompanying and form-` ing part of the presentspecification I have shown in detail aV form of embodiment of the`invention which I will setforth fully in the following description toenable those skilled in the art to practice the same. I do notnecessarily limit myself to this particular disclosure; I ma de arttherefrom in several res ects wit in t e 4scope ofthe invention de nedby the claims following said description. y

Referring to said drawings: Figure 1 is a vertical sectional view of thelugwith the parts thereof assembled in full ines, the dotted linesshowing the cap as disconnected from the body.

Fig. 2` is a bottom plan view of the plug.

Fig.`3 is a horizontal section on the line 3-3 of Fig. 1, looking'in thedirection. of `the arrows.

Fi 4 is a section' on the line 4 4 of Fig. 2,100 ing inthe direction ofthe' arrow.

5 and 6 vare detail views 1n perspective o f terminals. y

Like characters refer to like parts throughout the several views, whichare on different scales. f

The attachment plug comprises a base member and a ca tration' as thoseenoted in a general Way by 2 and 3 respectively. These two parts areafter the usual fashion'detachabl 'associated'. The extension cord socal ed, as

I .will hereinafter explain, is directly 'con-M nected with the capmember. The base member 2, involves in its structure a body as 4. Thisbody or core is ofA some insulating material such as porcelain orcomposition. It is 'generally made of cylindrical shape and receivesaround it the base shell 5 which after the usual fashion is made ofmetal so as to constitute a conductor. The base shell member Such forillus? is threaded, thus adapting it to fit an incandesc'ent lamp orother socket. This base shell 5 as common in this class `of articlescomparatively closely hugs or encirclesthe body or core el andatvm'reend; the base end as shown, is provided with a fiange 6 over'-lying the base portion of the body or core 4.. Said body or core has thelongitudinal passages or openings 7 and 8 which as shown extend thecomplete length of the body. Said passages or openings 7 and S'areadapted for the reception of suitable contact members 9 and 10. Thecontact 9 is provided at one end with an inwardly extending terminalwhichv is united in the presentcase electrically with the Contact shell5. As shown said contact 9 is provided at its end with a lateralextension 411 which overlies the'flange 6 of the shell. As shown theinsulating body 4 is provided with two hollow rivets, eyelets or screwsas 12 which are molded into the insulating'body l and the projectingportions of which extend .through openings or perforations in the iiange6 and lateral extension ll respectively, .the hollow rivets being headedover the lateral extension 11 to thus securely holdthe Contact 9 landthe contact shell 5 in pro er relation 'with theinsulating body '-l. visresilient contact 9 is as clear complemental to the Contact 10., the twocontacts, however, being insulated from each other as I will hereinafterset forth. Thus the means whichv hold the contact shell in place secure.4the contact 9 or analogous memberspin position or vice versa.

The Contact 10 is` rovided near its outer end with'the inward vbentortion 13, this in turn being provided wit the outwad prolongation14 terminating in the disk L5 which overlies the central cylindricalprojection 16 of the body or core 4. This disk -15 fits solidly latwiseagainst the outer face of the central projection 16 and in the In viewof this circumstance it is unnecessar as shown to` 'centrally perforatethe bodY or core @for the rece tion Vof a'screw or t e Which'isgenera yin an attachment plug provided to secure' the central end contact inplace and also in some cases to carry current. As a matter of fact not.only is this important, but I also attach some importance to the factthat I eliminate altogether in the base or body part of the plug at anyrate, the use of screws. The free portions of the contacts 9 and 10areengageable by complemental contacts associated .with -the cap member,and itis clear that when they are thus engaged'and that when theattachmentl plug isfitted in a socket, the circuit will be in closedrelation.

Asj shown the lateral extension 13 is provided with the'ears 13 fittedagainst the i'lat face of the body or core 4 and perforated as at 14 toreceive the hollow rivets 15. 'These hollow vrivets are embedded in themass of the body 4 and their inner ends are expanded'the'rei'n tb'holdthem in place `while if necessar said body' is in a plastic orcomparative y plastic condition. The rivets project .from the flat upperface of the body 'andi 'extend through the perforations 14 and areheaded over the ears 13 to hold A1-0. as will be understood, is insuthecontact 10 Securely in. position. This rom the-shell 5. y s

'p ember 3 comprises the cap l 1, 7,-whi ch following the cus.' made 'ofinsulating material. ody'fflz are connected termiiation therewith of thefconr. rf-w resl20an'd 21. The terminals vvecontacts22 and 23 respec cir'e'lat-ive ,withV the spring v.coritacts forinterlocking them-to1guard against' their aecidentals'eparatlon. n the present case both-thecontacts 23' aire interlocked wthfthe' lcoperatingnncontacts 9 and `10.

, resi-lien contactsandjp are furnished which ho areformed -by slittingor d contacts near their free d .slots "2 5 in "the contacts 22 and n]win-be ala sewn-es 2o and is Vseparat'eved; from vthev base member2 asshownsby vdotted lines in Fig. 1 and that it is.dQsi-redto'connectthetwo' arts as shown in slaid view. oraccomplish t isV particular-"purpose.the contacts 22 and v 23- illl-fbe* introduced into the passages `7.and-'8 and :moved therealong until the free 'ends of thecontacts- 22and 23 ,strike the 9 -lianving provision for ythe v y v I .ydo'fvnot"Ielyupon themere en- ,gagement `fthecontacts 4but providemeansfreeends,with-projections as 24 the 'stock outwardly..

ltachment of .the two -members of the appliance. 1

The bod has at its upper end the cavity or' counter ore 30 intersectedby the openings 7 and 8 into whichy itwill be remembered the resilientcontactvportions 23 are introduced. ,The contacts 22'and 23 as theyapproach the body or core member 4 initially at their free ends enterthis counterbore or cavity which thus insures proper passage of saideontacts'into the openingsA and 8.

What I claim is:

1. An electrical attachment plug comprising an insulating body, acontact shell surrounding the body and provided withva flange bearingagainst an end of the body',

contacts inthe body provided with lateral' extensions, one of thelateral extensions'v being fitted against said flange to thus put lthetwo into electrical connection, the other lat- "eral extension and itscontact being insulated from said shell, and rivets molded vinto thebody and extending through both l ,fiange and the other being fittedagainst an end of tlfe'body to connect one contact electrically with theshell and to insulate the other therefrom, and two pairs ofI rivetsmolded into the lbody, one pair of rivets ex tendingthrough the terminalportions of one extension and the other pair-of rivets through theother" extension at the terminals of the latter, the ,rivets beingheaded over the respective extensions.

' -Inftestimony whereof I affix my signature in the' presencel of twowitnesses.

n 'JOHANN G. PETERSON.

Witnesses: i I l L. L. Manner., ,Y

HEATH SUTHERLAND. y

extending through the .flange andalso

